Prasar Bharati Previous Years Model Questions
People who are appearing for Prasar Barati exam can just see the model questions below and test their knowledge. Sample test paper EA Engineering Assistants and Technician in AIR and DD 2013 may Contain physics MCQ Questions on electrical field, magnetic wires, magnetic field intensity, electrical coil, electrical charges, magnetic, magnetic induction, , induction magnetic, electrical magnetic, magnetic plates,
1. Which one of the following physical quantities, is not defined in the terms of force per unit area:
(a) pressure (b) strain (c) stress (d) Young’s modulus
Ans:b
2. The distance moved by a moving body is equal to:
(a) area between the distance-time graph and distance axis
(b) area between the speed-time graph and time axis
(c) area between the distance-time graph and time axis
(d) area between the speed-time graph and distance axis.
Ans:b
3. A beaker containing water weighs 100 gm. It is placed on the pan of a balance and a piece of metal weighing 70 gm. and having a volume of 10cc. is placed inside the water in the beaker. The weight of the beaker and the metal would be :
(a) 170gm. (b) 100gm. (c)160gm. (d)30gm.
Ans:a
4. For the same kinetic energy, the momentum shall be maximum for:
(a) electron (b) proton (c) deuteron (d) alpha particle
Ans:d
5. The common balance works on the principle of equality of:
(a) forces (b) moments of forces (c) masses (d) masses of pans
Ans:b
6. A particle moves in a circle of radius R with a constant speed under a centripetal force F. The work done in completing a full circle is:
(a) 2RF (b)ΠR2F (c) 2ΠRF (d)Zero
Ans:d
7. When two quantities are plotted on the graph paper against each other and the result so obtained is ast. line, then
(a) Both the quantities are equal
(b) The quantities are inversely proportional to each other
(c) Sum of both is zero
(d) The quantities are proportional to each other
Ans:d
8. What is the order of magnitude of 260°?
(a)103 (10 cube) (b) 104 (10 to the power of 4) (c)102 (10 square) (d) 10
Ans:c
9. The maximum value of g is:
(a) At the poles (b) At the top of the Mount Everest
(c) At the equator (d) Below the sea level
Ans:a
10. A fixed volume of gas at 27°C exerts a pressure of 750 mm. If the gas is heated to a pressure of
1500mm., temperature must be:
(a) 600°C (b) 327°C (c) 54°C (d) 13.5°C
Ans:b
11. A body of mass 2 kg acted upon by a constant force, travels a distan
ce of 3 metres in the first second and a further distance of meter in the next second. The force acting on the body is?
(a) 12 Newtons (b) 8 Newtons (c) 4 Newtons (d) 1 Newton
Ans:c
12. Two forces each equal to P acting at a point have no resultant. The angle between the two forces
must be equal to:
(a)180° (b) 90° (c)0° (d) 120°
Ans:a
13. A jet engine works on the principle of:
(a) conservation of energy
(b) conservation of momentum
(c) conservation of mass
(d) conservation of temperature
Ans:b
14. A sharp knife cuts much better than a blunt one because?
(a) Area of sharp knife is much less than the area of the blunt one
(b) sharp knife is brighter
(c) sharp knife is colder
(d) sharp knife is costly
Ans:a
15. A man carries a heavy box on his head on a horizontal plane from one place to another.
In this he does?
(a) maximum work (b) no work (c) negative work (d) minimum work
Ans:b
16. The bob of a second’s pendulum is replaced by another bob of double mass. The new time period will
be:
(a) 4 sec. (c) 2 sec. (b) 1 sec (d) 3 sec.
Ans:c
17.A device for measuring temperatures at a distance is
(a) gas thermometer (b) mercury thermometer (c) radiation (d) maximum-minimum thermometer
Ans:c
18. A piece of ice is floating in a concentrated solution of common salt (in water) in a pot. When ice melts
completely, the level of solution will:
(a) go up (b) remain the same (c) go down (d) first go up then go down
Ans:a
19. A radioactive source has a half-life of 30 days. During a period of 90 days the fraction of atoms that have decayed would be
(a)100% (b) 87.5% (c)64% (d) 50%
Ans:b
20. A black body emits:
(a) radiations of all wavelengths
(b) no radiations
(c) radiations of only one wavelength
(d) radiations of selected wavelengths
Ans:a
(a) radiations of all wavelengths
(b) no radiations
(c) radiations of only one wavelength
(d) radiations of selected wavelengths
Ans:a
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